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TT: Fachverband Tiefe Temperaturen
TT 92: Transport – Poster
TT 92.4: Poster
Donnerstag, 12. März 2026, 18:00–20:00, P4
On-surface spin characterisation of isolated molecules using room temperature NV magnetometry — •Olga Shevtsova1,2, Bernhard Putz3, Ulrich Ziener3, and Aparajita Singha1,2 — 1IFMP, TU Dresden, Germany — 2Würzburg-Dresden Cluster of Excellence (ct.qmat) — 3Universität Ulm, Ulm, Germany
Molecular spins have been receiving significant attention as promising candidates for quantum technologies, offering unique advantages in stability, tunability, and scalability. In particular, our work focuses on carbon-based open-shell molecular systems - stable chlorinated trityl radicals that host an unpaired electron spin. Understanding the coherent properties of these molecular spins is a crucial step toward their integration in practical quantum applications. However, probing such properties remains challenging due to limitations in sensitivity, environmental constraints, and the invasiveness of existing techniques.
Nitrogen-Vacancy (NV) centers in diamonds can operate over a wide temperature range and provide non-invasive optical readout, making them versatile and highly suitable tools for deepening existing knowledge. In this study, we leverage NV-center-based quantum sensors to investigate both the coherent properties of molecular spins and the limits of detecting extremely low spin concentrations, potentially down to a single spin. By combining the precision of NV magnetometry with the inherent stability of open-shell systems, our work aims to provide deeper insight into their viability as stable and controllable components for future quantum technologies.
Keywords: open-shell molecular systems; chlorinated trityl radicals; nitrogen-vacancy centers; quantum sensing